Lock-nut.



E. ER WIN LQGK NUT.

APPLIOATION FILED NOV.19, 1912 1,070,789. Patented 'Au 19, 1913.

I uoewto'o zz wzwm,

nvrrnn era ra n : enema. j

ELMEB ERWIN, OF VALLEY POINT, PENNSYLVANIA.

oon-nor.

Specification of Letters Patent.

Application filed November 19, 1912. Serial No. 732,316.

provide a nut which maybe readily locked.

against accidental unscrewing and which through a suitable manipulation of the looking means may be'as readily and conveniently removed as an ordinary nut.

The invention in its preferred form of details will be described in thefollowing i specification, reference being had to the accompanying drawing, in which- Figure 1 is a vertical sectional view through my improved lock'nut showing the same applied to'a bolt, Fig. 2 is a bottom plan view of a lock nut showing the locking member in one position, Fig. 3 is a similar view showing it in the opposite position, and Fig. 4; is a vertical central section through thenut.

In the drawings, the improved nut 1 is formed with a usual threaded bore 2 and for the purposes of the present invention this bore is circumferentially enlarg d from one face of the nut for a portion of its depth to provide a chamber '3' the wall of which is plain or unthreade'd. Through the wall of the chamber 3 is a transversely arranged opening a which at its outer end communicateswith achannel 5 formed in the side or" the nut, this channel extending longitudinally or in parallelism with the bore of the nut. r

The-locking member 6 is provided ofpecnliar construction, saidmember comprising a single length material, including a shank having its inner end of spring material and projected at an angle to the main length of the bar, the inner terminal 7 of the member 6 forming an engaging point. The end of the looking member opposite the spring point is bent laterally, as'at 8, being of a I 5 the spring point will overlie the bore of p size to fit in the channel 5. The locking member is passed through the opening 4 in the wall of the nut and with its laterally bent end 8 resting in one end of the channel the nut. The bolt 9 is formed with longitudinal channels 10 onewall' of which is arranged radially of the bolt and .the other wall inclines with relation thereto, the radially exposed wall forming a stop. In use it will be obvious that with the projecting portion 8 pf the locking member disposed in the channel 5 that the free terminal of said projecting member extends toward the head of i the bolt, the spring point of the locking member will in the turning of the nut on the bolt override the grooves therein but through engagement. ofthe spring terminal and one of the shoulders of the groove will prevent the reverse movement of the nut. When it is desiredto remove the nut the locking member is drawn outwardly, the spring portion permitting such movement and the p'or, tion 8 reversed, that is, arranged with such Patented Au raisin.

portion 8 thereof in the opposite end of the 40118111181. In this position it Will be obvious that a freeunscrewing of the bolt is permitted, the spring point now overriding the radial shoulders of the grooves in the bolt in a reverse direction.

The improved bur is of similar construction and the locking means described may be readily applied to any type of bur or nut in use. The locking member is to be made of a single length of material of suificient strength to resist accidental turning of the bur and at the same time to prevent breakago through strain on the parts.

What is claimed is: A locking nut having an enlarged chamber concentric with the bore, a locking member project-ion through the chamber and having a terminal offset spring point to en'- gage longitudinal channels in the bolt,.the outer end of the locking memberhaving a lateral projection adapted to be disposed in either of two positions in the channel formed in the outer surface of the nut to reverse the locking effect of the spring point of said member with respect to the longitudinal" channels in the bolt.

In testimony whereof I aiiix my in presence of two witnesses.

swine. T"WIN.-

signature Witnesses:

FRANK H. HARRISON, (inns. INownns.

denies of this patent may be obtained for five cents each, by addressing the Gommissioaer of Eatents, Washington, D. 3. 

